Hi, ?I had used the openconnect (not the version 6.0.0 ?but the higher version ?in git)(compiled on Fedora 20 in VMWare) ?And then?DTLS handshake failed occurs. Just like below: Microsoft (R) Windows Script Host Version 5.8 Copyright (C) Microsoft Corporation. All rights reserved. VPN Gateway: 104.149.5.138 Internal Address: 10.1.1.209 Internal Netmask: 255.255.255.0 Internal Gateway: 10.1.1.1 Interface: "Local Area Connection 2" Configuring "Local Area Connection 2" interface for Legacy IP... done. Configuring Legacy IP networks: Route configuration done. Connected Local Area Connection 2 as 10.1.1.209, using SSL DTLS handshake failed: Resource temporarily unavailable, try again. And It will try a lot of times,but can't be successfull. ?but I dont't understand what ?the "?Resource temporarily unavailable" means. Thanks? Guang